Handy Units
hPa to inHghPa → inHg
1 hPa = 0.02953 inHg · 1 inHg = 33.8639 hPa
Formula
inHg = hPa ÷ 33.8638864
Example: 1,013.25 hPa = 1,013.25 ÷ 33.8638864 = 29.9213 inHg
These units differ only by a fixed factor: multiply by it to convert, divide to go back. The factors are exact international definitions (for example 1 inch = 2.54 cm exactly); results are rounded only for display.
hPa and inHg chart
| hPa (hPa) | inHg (inHg) |
|---|---|
| 950 hPa | 28.0535 inHg |
| 980 hPa | 28.9394 inHg |
| 1,000 hPa | 29.53 inHg |
| 1,013.25 hPa | 29.9213 inHg |
| 1,020 hPa | 30.1206 inHg |
| 1,030 hPa | 30.4159 inHg |
| inHg (inHg) | hPa (hPa) |
|---|---|
| 28 inHg | 948.189 hPa |
| 29 inHg | 982.053 hPa |
| 29.5 inHg | 998.985 hPa |
| 29.92 inHg | 1,013.21 hPa |
| 30 inHg | 1,015.92 hPa |
| 30.5 inHg | 1,032.85 hPa |
| 31 inHg | 1,049.78 hPa |
About these units
Hectopascal (hPa)Hectopascals: 1 hPa = 100 Pa, the same as a millibar. Weather maps use it; standard sea-level pressure is 1013.25 hPa.
Inch of mercury (inHg)Inches of mercury, the pressure unit of US weather reports and aircraft altimeters; standard pressure is about 29.92 inHg.
Questions
How many inHg are in 1 hPa?
1 hPa = 0.02953 inHg.
How many hPa are in 1 inHg?
1 inHg = 33.8639 hPa.